Hanger-support for concrete floors.



E. E. HALL. HANGER SUPPORT FOR CONCRETE FLOORS. APPLICATION FILED JULY 26, 1909.

Paterited Feb. 27, 1912 INVENTOR I WITNESSES. v

Arm/mar,

put in place,

' removed, the bottom ERIC E. HALL, OF CHICAGO, ILLINOIS.

HANGER-SUPPORT FOR CONCRETE FLOORS.

Specification of Letters Patent Patented Feb. 27, 1912.

Application filed July 26, 1909. Serial No. 509,516.

7 '0 all toil-0m it may concern Be it known that I, Euro E. I'IALL, a citizen of the United States, and a resident of Chicago, in the-county of Cool; and State of Illinois, have invented certain new and useful Improvements in Hanger-Supports for Concrete Floors, of which the following is a full, clear, and exact specification.

My invention is;concerned with hanger supports for concrete floors, and is designed to produce a fixture that can be secured on the scaffolding while the concrete is, being so that when the concrete has ardened -tlnd the scaffolding is removed, perfectly alined supports, into wvhich hangers for shaft-ing, etc, can be screwed, Will remain embedded therein, with their lower ends threaded or otherwise provided with hanger-engaging means flush with the ceiling.

To illustrate my invention in some of its preferred forms, I annex hereto a sheet of drawings, in which the same'refcrence characters are used to designate identical parts in all the figures, of whicl1,

Figure l is a view of a support embodying my invention in place upon the scaffolding before the concrete is filled in, the lower portion thereof being in central vertical section; Fig. 2 is a. side elevation of the screw detached; Fig. 3 is a view similar to the lower part of Fig. 1, but showing a preferred form; Fig. 4 is a view of the lower end of the form shown in Fig. 3; and Figs. 5 and 6 are a side and top plan View, respectively, of the form of screw employed in connection with the form shown in F ig. 3.

In laying floors of reinforced concrete, it will be understood that a scaffolding 10 has to be em loyed, upon which the soft concrete is place ,and upon which it hardens. After the concrete is set, thescadoldin is removed. Where Such floors are einp oyed in buildings designed for manufacturing purposes, it is necessary to have supports in the flooring, so that hangers can be attached thereto and suspended from the ceiling for line shafting, and it is the object of my invention to produce a support of this char actor that can be readily held in place whilethe filled in, and so that when and conveniently concrete is being the scaffolding is part of the support will be flush with the ceiling and not covered by 5 .the concrete.

Inscarrying out my invention, I employ a -to be located, and a few body portion 11, which is conveniently generally tubular in its shape, for economy of material and lightness, and is preferably provided at its upper end with a hub 12, which may take the elongated rectangular form shown and. have a flat surface, which may be flush with the top floor when it is completed in order to indicate the location of t -e hanger. vided at its lower end with some suitable engaging means by which a hanger can be secured in place, the preferred construction being that the body portion is hollow and internally threaded, as at 13.

' The lower end 14 preferably flares a little, as shown, and has the surface adapted to fit squarely on the top of the scaffolding. To temporarily hold the hanger in place, I provide some form of engaging means, such as a screw 15, the screw portion proper 16 of which is a woody screw, which can be readily and conveniently screwed into the upper surface of the wood constituting the scaffolding 10. To hold the screw in place while it is being screwed into the scaffolding, and while the concrete is hardening, I provide the screw with a head 17, which is adapted to engage the lower end of the body portion of the hanger, a simple engaging means being that the head 17 shall be externally threaded with the same pitch and diameter as the internal. threads at 13. With the-screw in place in, the hanger, the point of the screw can be readily forced into the top of the scailolding at the point where the hunger is head 12 will suflice to screw the hanger securely in place, as indicated in Fig. 1. After the concrete is set, the scaffolding 10 is stripped off of the lower side oftheconcrate, the fibers of thewood engaging the tl'ireads, of course, yielding readily to this stripping process. The screw 15 can then be readily removed by applying a wrench to the squared portion 18 provided for this purpose, after u'hiclnof port is ready for the application thereto of the hanger proper.

In Figs. 3 to 6, I have shown a preferred form, .in which a somewhat cheaper form of screw 15 can be employed. The body por support is the same in tion of the hanger this form as in the form shown in-Fig. 1,

but the bottom portion 14 has on its innerface the two interrupted converging threaded portions-19, which are adapted to The body portion 11. is pro-- turns given to the course, the hanger supessary to release the ing claims exceptas may be provided with engaging means,

2 cotiperate with the beveled ends 20 of the head 17, which head in this form preferably takes the form of the rectangular bar shown. With the head at right angles to the position shown in Figs. 3 and 4c, it will be evident that it can be inserted in the hanger support, after which if it is turned through an angle of ninety degrees, it will be securely held in place, and if the hanger is turned in the direction to drive the screw 16, it will still be held in place. When the scaffolding l0,has been stripped oil of this form, a wrench applied to the head 17 will permit it to be turned through the angle of ninety degrees, or so much thereof as is necscrew, after which the hdnger. can. be secured in the support in the same manner as in the other form.

While I have shown and described my invention in the forms which I at present con sider best adapted to carry out its purposes, it will be understood that it is capable of modifications, and that I do not desire to be limited in the interpretation of the follownecessitated by the state of the prior art.

lVhat I claim as new, and desire to se cure by Letters Patent oi the United States, 1s:

L In a device of the class described, the combination. with a body portion adapted to be embedded in-t'he concrete and be held from movement therein and having one end 7 of a set screw having a head, which head is adapted to temporarily cooperate with said engaging means so that the bodyportion can be rigidly secured to a scaffolding before the concrete is placed about it by merely turning the body portion with the temporarily attached screw to drive the latter into the scafiolding.

2. In a device of the class described, the

be embedded in the cdncrete and be held from movement therein, having a flat head on one end and the other end provided with engaging means, of a screw having a head,

which head is adapted to temporarily cooperate with sa d engaging means so that the body portior can be rigidly secured to a scaffolding before the concrete is placed about it by merely turning the body portion with the temporarily attached screw to drive the latter into the scaffolding.

3. In a device of the class described, the

combination with a body portion adapted to engage the concrete and be held from movement therein and provided'with en gaging means, molly-threaded portion and an interrupted converging threaded portion, of a screw having a head adapted to enterand be secured by said converging threaded portion as the screw is turned in one direction, substantially as described. 4

4. In a device of the class described, the

combination with a body portion having a flat head on one end and the otheren'd'pro' vided with engaging means, consisting of a main internally-threalicd portion and an interrupted converging threaded portion, of a screw having a head adapted to enter and be secured by said converging threaded portion as the screw is turned in one direction, substantially as described.

consisting of amain inter- 5. In a device of the class described,'t he \Vitncsses:

F. I). BROM, JOHN IIOVARD Mo-EnnorQ I i 7 hand and aiiixed my seahr'this 24th day combination with a body portionadapted to of July, A. D. 1909 

